During the 20th century, costume jewelry became popular amongst sartorial enthusiasts, replacing pieces crafted from expensive materials such as precious metals, gems and stones. The Art Deco period of the 1920s and 1930s saw fashion icon, Coco Chanel, introduce bangles, cocktail rings and other types of costume jewelry. Developments in plastic after the Second World War instigated a period of brightly-coloured, chunky pieces, contrasting the delicate jewelry of eras passed. These pieces made from cheaper, man-made materials were more accessible, affordable and exciting amongst youth culture, introducing new designs that had not been created before. Fine jewelers and designers came to embrace this new movement, recreating these designs with luxurious touches; some of the most notable fashion houses to produce costume jewelry include Dior and Chanel.